Views: 1 Author: Site Editor Publish Time: 2022-02-08 Origin: Site
Appearance: A group of several or dozens of fabrics, after continuous dyeing under the same set conditions, the beginning and the end of the dyed fabrics, there are shades of difference in color.
Causes: 1). In the pretreatment process, there are differences in desizing, scouring, bleaching, mercerizing, and shaping before and after a batch of fabrics occurs. 2). In the open-width cross-roll dyeing, the dyeing rate of the combination of dyes used is inconsistent, the method of guiding the cloth and the roll is not appropriate, the dye is added incorrectly, and the dyeing temperature is not properly controlled, all of which will cause the color difference between the beginning and the end. 3). During continuous dyeing, the pressure suction rate changes, the stability of the dyeing solution is not good, and the temperature during drying changes gradually. 4). If the compatibility between the dye and the auxiliary used in combination is poor, an uneven layer of dye particles and water will occur. Due to capillary action, water first enters the fiber, resulting in a change in the concentration of the dye solution, resulting in a color difference between the beginning and the end. 5). When dyeing with ice dye, the dye will gradually hydrolyze during the long-term soaking process, which will also cause the color difference between the beginning and the end.